PROJECTED MODEL of the plumage changing for the SHORT-TOED EAGLE (CIRCAETUS GALLICUS)
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↓ 2nd ver., correction based on:
• Campora M., Cattaneo G., 2005 – Ageing and sexing Short-toed Eagles // British Birds, 98 : 370-376; • Pavón D., Limiñana R., Urios V., Izquierdo A., Yáñez B., Ferrer M. & de la Vega A., 2010 – Autumn migration of juvenile Short-toed Eagles Circaetus gallicus from southeastern Spain // Ardea, 98 (1) : 113–117. |
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| calendar year » | 1 | 2 | 3 | 4 | 5 | 6… |
| jan | I | II (I) | II | III (II) | III | |
| feb | I | II (I) | II | III (II) | III | |
| mar | I»II | II (I) | II | III (II) | III | |
| apr | I»II | II (I»II) | II»III | III (II»III) | III | |
| may | I»II | II (I»II) | II»III | III (II»III) | III | |
| jun | birth | I»II | II (I»II) | II»III | III (II»III) | III |
| age, years » | 0 ↓ | 1 ↓ | 2 ↓ | 3 ↓ | 4 ↓ | 5… ↓ |
| jul | »I | I»II | II (I»II) | II»III | III (II»III) | III |
| aug | »I | I»II | II (I»II) | II»III | III (II»III) | III |
| sep | I | I»II | II (I»II) | II»III | III (II»III) | III |
| oct | I | I»II | II (I»II) | II»III | III (II»III) | III |
| nov | I | II (I) | II | III (II) | III | III |
| des | I | II (I) | II | III (II) | III | III |
| ↓ month |
proved partial summering in the wintering regions (%-?) |
maturity | ||||
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↓ 1st ver., based on:
• Cramp S., Simmons K.E.L. (Eds.), 1980 – The Birds of the Western Palearctic. – Vol. 2. – London: Oxford University Press. – 695 p.; • Forsman D., 1999 – The Raptors of Europe and the Middle East. – London: Poyser. – 589 p. |
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| calendar year » | 1 | 2 | 3 | 4 | 5 | 6… |
| jan | I | II (I) | III (II) | III | III | |
| feb | I | II (I) | III (II) | III | III | |
| mar | I»II | II (I) | III (II) | III | III | |
| apr | I»II | II»III (I»III) | III (II»III) | III | III | |
| may | I»II | II»III (I»III) | III (II»III) | III | III | |
| jun | birth | I»II | II»III (I»III) | III (II»III) | III | III |
| age, years » | 0 ↓ | 1 ↓ | 2 ↓ | 3 ↓ | 4 ↓ | 5… ↓ |
| jul | »I | I»II | II»III (I»III) | III (II»III) | III | III |
| aug | »I | I»II | II»III (I»III) | III (II»III) | III | III |
| sep | I | I»II | II»III (I»III) | III (II»III) | III | III |
| oct | I | I»II | II»III (I»III) | III (II»III) | III | III |
| nov | I | II (I) | III (II) | III | III | III |
| des | I | II (I) | III (II) | III | III | III |
| ↓ month |
possible partial summering in the wintering regions (%-?) |
maturity | ||||
| Unique [typical] characters of the plumage types | Explanatory notes | |||||
| I – dense reddish extensive “hood”; reddish blurred not crosswise spots on belly, breast and flanks; [secondaries without top dark bar; absent or pale marks at tops of under coverts of primaries and secondaries;] … else? |
I, II, III – types of plumage with certain unique characters | |||||
| I»II – replacement of one plumage type by another while moulting | ||||||
| II – whitish head from above with dark long-drawn sharper marks or completely without them; contrast of head and mantle; central thin lengthwise darker parts of the spots along quills of the belly, breast and flanks feathers are more clear-cut; [secondaries without top dark bar; absent or pale marks at tops of under coverts of primaries and secondaries;] … else? |
(I) – existence of some feathers of previous type partly remained after last moulting | |||||
| (I»III) – replacement of partly remained feathers by new ones while moulting | ||||||
| III – wide dark bar at tops of secondaries; sharp greyish dark marks at tops of under coverts first of all of primaries and also of secodaries; more greyish in general; sharp crosswise bars on belly, breast and flanks; [dark head from above, no contrast with mantle] … else? |
– spread in time for the beginning and the ending of moulting is shown by wide bluish left and right borders | |||||
| – general changing of the plumage colouration according to periods of more and less intensive moulting is shown by different colours | ||||||
| At the same time every plumage has high individual variability in quantity (but not in shape and in colouration) of dark marks on different parts of body … else? | ||||||
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